Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Ultrakurze Pulse: Erzeugung III

Q 15.1: Vortrag

Dienstag, 3. März 2009, 10:30–10:45, Audi-A

Generation and characterization of ultrashort laser pulses — •Alexander Sperl, Konstantinos Simeonidis, and Ullrich Joachim — MPI für Kernphysik, 69117 Heidelberg

In atomic and molecular physics experiments extremely short laser pulses, mostly in the sub ten-femtosecond range, are required. The shorter the pulses are and correspondingly their bandwidth grows, the more important dispersion management and control becomes.

A new setup for spectral broadening involving self phase modulation (SPM) via filamentation and subsequent recompression as well as pulse characterization through an interferometric autocorrelation setup with low dispersion properties are presented. While the so called SPIDER and FROG techniques yield more or less complete information about the pulse parameters, however, they are difficult to implement and their handling is not as easy as often desired. In contrast the interferometric autocorrelation is a comparatively fast measurement, which is helpful in terms of day-to-day adjustments. Even though the information is incomplete, one can retrieve semiquantitative hints towards the pulse chirp by simulating the complete autocorrelation signal, including the GDD parameter.